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StoneRoad2013's photos with the keyword: PCR
![cvd - test positivity [dec 2021]](https://cdn.ipernity.com/200/26/88/51132688.0950eb39.240.jpg?r2 "cvd - test positivity [dec 2021]")
cvd - test positivity [dec 2021]
| 01 Jan 2022 |
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Some calculations and assumptions about the +ve / -ve ratios for LFT and PCR tests.
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Not my Image ; Fair Use & public information
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